A dad had a system worked out with his kid called X-plan where all his son had to do to get out of a bad situation was text the letter X and he'd be on his way to save him.
In my world though, the kid meant to type "XD" and got busted at the party he was while trying to hit on a girl.
I dunno. I can understand being protective of your kids, but also, I kinda think maybe you should raise them to not be such pussies.